Match the column
A) Cryalite P)CazB $_{6}$ O $_{12}$ 5H $_{2}$ O
B) Calemanite Q) Al $_{2}$ O $_{3}$ 2H $_{2}$ O
C) Bauxite R) Na $_{3}$ AlF $_{6}$
D)Sidente S) FeCO $_{3}$
T) Na $_{2}$ B $_{4}$ O $_{7}$ 10H $_{2}$ O

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Solution

Cryolite $(N a_{3} A l F_{6})$ and Bauxite $(A l_{2} O_{3} .2 H_{2} O)$ are the ores of Aluminium

Colemanite $(C a_{2} B_{6} O .5 H_{2} O)$ and Borax $(N a_{2} B_{4} O_{7} .10 H_{2} O)$ are the ores of Boron

Siderite $(F e C O_{3})$ is the ore of iron

Hence the correct answer is $A - R, B - P, C - Q, D - S$

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Mention X and Y.

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(ii) $H_{2} O_{2}$ + $⟶$ $H_{2} O + O_{2}$

(iii) $M g (O H)_{2}$ +HCl $⟶$ $M g C l_{2}$ + $H_{2} O$

(iv) Fe + $O_{2}$ $⟶$ $F e_{2} O_{3}$

(v) $A l (O H)_{3}$ $⟶$ $A l_{2} O_{3}$ + $H_{2} O$

(vi) $N H_{3}$ + CuO $⟶$ Cu + $N_{2}$ + $H_{2} O$

(vii) $A l_{2} (S O_{4})_{3}$ + NaOH $⟶$ $A l (O H)_{3}$ + $N a_{2} S O_{4}$

(viii) $H N O_{3}$ + $C a (O H)_{2}$ $⟶$ $C a (N O_{3})_{2}$ + $H_{2} O$

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(x) $B a C l_{2}$ + $H_{2} S O_{4}$ $⟶$ $B a_{2} S O_{4}$ + $H C l$

{N a}_{2} S_{2} O_{3}

2 {N a}_{2} S_{2} O_{3} + I_{2} ⟶ {N a}_{2} S_{4} O_{6} + 2 N a I

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